org.apache.tapestry5.corelib.components
Class Hidden

java.lang.Object
  org.apache.tapestry5.corelib.components.Hidden

All Implemented Interfaces:

ClientElement

@SupportsInformalParameters
public class Hidden
extends Object
implements ClientElement

Used to record a page property as a value into the form. The value is encoded when the form is rendered, then decoded after the form is submitted back to the server, and the "value" parameter updated.

The encoding and decoding is done via a ValueEncoder, therefore you must either bind the "encoder" parameter to a ValueEncoder or use an entity type for the "value" parameter for which Tapestry can provide a ValueEncoder automatically.

Since:

5.1.0.2

Component Parameters

Name	Description	Type	Flags	Default	Default Prefix	Since
encoder	A ValueEncoder used to convert the server-side object provided by the "value" parameter into a unique client-side string (typically an ID) and back. Note: this parameter may be OMITTED if Tapestry is configured to provide a ValueEncoder automatically for the type of property bound to the "value" parameter.	org.apache.tapestry5.ValueEncoder	Required		prop
nulls	Defines how nulls on the server side, or sent from the client side, are treated. The selected strategy may replace the nulls with some other value. The default strategy leaves nulls alone. Another built-in strategy, zero, replaces nulls with the value 0.	org.apache.tapestry5.NullFieldStrategy		default	nullfieldstrategy
value	The value to read (when rendering) or update (when the form is submitted).	Object	Required		prop

Constructor Summary

Hidden()

Method Summary

String	getClientId() Returns a unique id for the element.
String	getControlName()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Hidden

public Hidden()

Method Detail

getClientId

public String getClientId()

Description copied from interface: ClientElement

Returns a unique id for the element. This value will be unique for any given rendering of a page. This value is intended for use as the id attribute of the client-side element, and will be used with any DHTML/Ajax related JavaScript.

Specified by:

getClientId in interface ClientElement

getControlName

public String getControlName()